Some 4,676 homes in Exmouth, Plymouth and Axminster were plunged into darkness this morning, according to Western Power Distribution.
Lashing rain and gales swept swathes of the region through the early hours with further foul weather forecast in the run up to the weekend.
Once again the southwest is most at risk from heavy rain prompting government officials to issue a raft of cautions.
The Environment Agency (EA) has put out 14 flood alerts and two more serious flood warnings across southwest England.
A spokesman said: “Local surface water flooding is possible in the south-west of England and Wales on Wednesday, with local river flooding also possible for parts of South Wales.
Thousands of homes were plunged into darkness this morning, according to Western Power Distribution
We expect another wet and windy day except it is probably going to be worse with more heavy rain moving eastwards
“Land and roads may flood and there may be disruption to travel.”
Plunging temperatures will bring the risk of snow in Scotland and the north with wintry possible showers elsewhere.
The Met Office has issued a severe weather warning for snow in Scotland and northern England until this afternoon.
Forecaster Charlie Powell said a more powerful weather system is poised to sweep the nation tonight and through tomorrow.
He said: “Squally showers are forecast through the rest of today with some strong winds likely before another more active weather system moves in on Wednesday,.
The EA has put out 14 flood alerts and two more serious flood warnings across southwest England
“We expect another wet and windy day except it is probably going to be worse with more heavy rain moving eastwards.
“It will also be windy with bad weather coinciding with morning and evening rush hours.”
Met Office chief forecaster Laura Paterson said rain will increasingly turn to snow through the rest of today.
Up to four inches is possible over high ground bringing a risk of road closures and transport disruption, she warned.
She said: “A band of rain and hill snow will increasingly turn to snow at lower levels as it moves east through Tuesday morning and early afternoon.
The weather could cause road closures and stranded vehicles
“Some roads and railways are likely to be affected by snow with longer journey times by road, bus and train services.
“There is a small possibility of road closures and stranded vehicles.
“[Snow] accumulations of five to 10 centimetres [four ins] are likely above 200 to 300 metres, much of this falling in a short period.
“At lower levels, amounts will be much more variable with two to five centimetres possible in some places, most likely in the southwest, while others will just see sleet and rain.”
The Environment Agency has issued a raft of flood alerts and warnings across southwest England and parts of the northeast.
Heavy rainfall through today and tomorrow will push up river levels bringing a risk of flooding
It warned heavy rainfall through today and tomorrow will push up river levels bringing a risk of flooding.
A spokesman added: “Take care near low lying land and roads close to rivers where flooding is possible and monitor your local weather conditions.
“We are monitoring river levels.”
WeatherOnline forecaster Simon Keeling said: “It will be an unsettled to close this week with the risk of rain, wind, sleet and some snow.
“Higher pressure is expected to be building into the weekend and next week.
Plunging temperatures will bring the risk of snow in Scotland and the north
“This brings drier conditions for most with temperatures close to average.”
Western Power Distribution blamed a fault on the network for the loss of power to thousands of homes this morning.
It said engineers are out in force repairing the network with power being redirected while the problem is fixed.
Around 500 homes across the region are currently still without power.
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